Andrew Thauer
45 lines
1.4 KiB
Bash
Executable File
45 lines
1.4 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -Eeuo pipefail
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# Run nginx as root
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sed -i 's/user nginx.*$//' /etc/nginx/nginx.conf
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# Write selected env vars to nginx config
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envsubst '$PORT' < /etc/nginx/conf.d/default.conf.template > /etc/nginx/conf.d/default.conf
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# Inject runtime config into the client
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function inject_config() {
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# Read runtime config from env in the same way as the @backstage/config-loader package
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local config
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config="$(jq -n 'env |
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with_entries(select(.key | startswith("APP_CONFIG_")) | .key |= sub("APP_CONFIG_"; "")) |
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to_entries |
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reduce .[] as $item (
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{}; setpath($item.key | split("_"); $item.value | try fromjson catch $item.value)
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)')"
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>&2 echo "Runtime app config: $config"
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local main_js
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if ! main_js="$(grep -l __APP_INJECTED_RUNTIME_CONFIG__ /usr/share/nginx/html/static/*.js)"; then
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echo "Runtime config already written"
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return
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fi
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echo "Writing runtime config to ${main_js}"
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# escape ' and " twice, for both sed and json
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local config_escaped_1
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config_escaped_1="$(echo "$config" | jq -cM . | sed -e 's/[\\"\x27]/\\&/g')" # \x27 = '
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# escape / and & for sed
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local config_escaped_2
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config_escaped_2="$(echo "$config_escaped_1" | sed -e 's/[\/&]/\\&/g')"
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# Replace __APP_INJECTED_RUNTIME_CONFIG__ in the main chunk with the runtime config
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sed -e "s/__APP_INJECTED_RUNTIME_CONFIG__/$config_escaped_2/" -i "$main_js"
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}
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inject_config
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exec nginx -g 'daemon off;'
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